Automobile-lock



C. KNAPP. yAuowlolpelocx. APPLICATION FILED OCT. I8, 1919.

` 1,391,390, y Patenasept. zo, 1921.

PATENT OFFICE.'

KNAPP, l' MINNEAPOLIS, MINNESOTA.

AUTOMOBILE-LOCK.

Specification of Letters Patent.

Patented Sept. 20, 1921.

Appliation led October 18, 1919.. Serial No. 332,080.

'. To all lwhom. it may concern:

Be it known that I, 'CHARLES KNArP, a citizen of the United States, anda resident of Minneapolis in the county of Hennepin and State of'nnesota, have invented certain new and useful Im rovements in anAutomobile-Lock, of whic the following is a s eciiication.

ne object of lmy invention is to provide in an automobile llock meansfor locking directly onto the fly wheel of the engine.

Another object is to provide means for making the' lock effective shouldthe lock bolt be brought onto the locking meansl without being iiiperfect alinement therewith.

Another object is to provide improved means for holding the lock boltinto locked relation with its locking means. t

With these and incidental objects in view, the invention consistsofvcertain novel features of construction and combination of arts, theessential elements of which are ereinafter described with reference tothe drawing which accompanies and forms a part of this specification.

In the' drawing, Figure 1 is a fragmentary plan view of a transmissionhousing having my improved lock a plied thereto; Fig. 2 is an'enlargedsectiona view taken on the line 2 2, Fig. 1; and Fig. 3 is an enlar eddetail of a fra ent of the lock bolt, wit the two halves tV ereofseparated.

As shown in Fi 2, the fly wheel housin 1 has bolted or oierwise suitablyfastene thereto a casing 2 with a gasket 3 therebetween.

A threaded bushing 4 and locknut 5 form a closure for the lower end ofthe casing, and slidably mounted in the bushing 4 and in the casing at 5is a lock bolt 6, the end 7 of which is fashioned to closely nest withthe gear teeth 8 on the ily wheel 9', as ordinarily provided forcoperation with an electric starting motor generator.

The upper end of the lock bolt is formed 'into a tongue 7', fitting inthe slot 8 of the shaft 9, the pin 10 playing in the slot 11 of the ton'ment o 'the lock bolt.

The spring 12 positioned in the casing 2 abuts against the washer13,supported by l the pin 14 through the lock bolt 6 so the lock bolt isnormally pressed downwardly in engagement with t e gear teeth of the iywhee e 7 so as to allow a vertical move-l f lowin With the springcontrolled movement of the lock bolt as described, if the device shouldbe locked as `hereinafter described when the ily wheel stands in such aposition that the tongue on the end of the bolt would rest on top of oneof the gear teeth instead of nesting therewith, the spring 12 wouldforce the tongue vinto its locked position with respect to thev teeth,upon the first -slight movement of the fly wheel, if anyone shouldattempt to start the engine.

. The shaft 9 is threaded at 15 and engages -with the nut 16, rotatableby means ofthe hand wheel 17. A key 18 inserted through the p casing 2and passing tangentially through the annular space 19 maintains the nutin a fixed vertical position so the aturning of the nut will raise orlower the shaft 9,. It is therefore evident that the rotation of thehand wheel 17 will draw the lock bolt 6 out of engagement with the teeth8 if the shaft 9l is not locked by the -lock 20 and the hand wheel 17cannot be rotated if the vertical movement ofthe shaft 9 is prevented bythe lock 20.

The'lock 2O has a finger 21rotatable by the key 22, and is so positionedwith respect to the latch 23 that when the key is rotated in acounter-clockwise direction the finger 21 swings the latch downwardlyout of engagement with the catch 24 and then engaging with the lock bar25 at 26 retracts the bar from engagement with the shaft 9.

A lip 27 prevents the further rotation of the finger 2l and as the latch23 now engages with catch 24 in its notch 28 the key cannot -bewithdrawn unless the device is again locked. l Inasmuch as the Hy wheelv9 rotates in a counter-clockwise direction the tendencyvis for the gearteeth to force themselves into tighter engagement with the end 7 of thelock bolt 6, so the en ine cannot be started against `the locking 0% thelock bolt, as the spring 12, if comparativel light, will keep t e lockbolt in a positive ocked position in thev ear teeth.

hile I have described m invention and illustrated it in one particu ardesign, I do not wish it understood that l limit myself tothis'construct'ion, as it is evident that the application of theinvention may be varied in vmany ways within the scope of the folclaim:Claim: In an automobile lock the combination of ioo v a casing, a lockbolt slidabl mounted in a lock including a bolt positioned in said saidcaslng, a sprlng for. hol ix said .lock casing, said bolt being en ablewith said,

bolt in an extended position, a aft joined shaft, and means in saidlgoziefor withdraw- 10 to' said lock bolt,but allowing a definite ingAsaid bolt from engagement with said 5 slidable movement in relationthereto, roshaft.

tatable means carried by said casing for lifting said shaft and therebysaid look bolt, y CHARLES KNAPP.

